peach=toads come running across the stage knocking everyone over.
Frogger=sends out 3 other frogs that attack them for 10 sec.
Mega-man=turns into hyper form and his moves get doubled power.
Chibi-robo=takes plug and plugs it into closest character,(does 100% damage)
Sonic=runs at hyper speed and hits everyone in the air tons of times.
Fox=sends out his ships and hit everyone!

two of those people will probably never be in smash bros o.o (frogger and chibi-robo)